Features:It is small in size and easy to use.New technology, excellent performance.Small size, easy to carry and convenient to use.Double-sided USB design, both of sides can be used as plug.Touch dimmer type: It can be stepless Dimming by touch.Light sensor type: With light sensitive device, darker the light is, more bright the small lamp is.Can be put into a purse, also can be hung on the keys, very portable.Compatible with all standard USB device, power bank, mobile charger, computer or laptop.